It is their cat.
The cat is theirs.
This is your eraser.
The eraser is yours.
It is her table.
The table is hers.
This is her dog.
The dog is hers.
It is our classroom.
The classroom is ours.
This is his ice cream.
The ice cream is his.
This is their TV.
The TV is theirs.
It is his cup.
The cup is his.
This is my pen.
The pen is mine.
Those are my pencils.
The pencils are ours.